Book/Report

FZJ-2016-05186

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Beitrag zum Zeitstandverhalten artgleicher Schweissverbindungen einer Nickelbasislegierung unter besonderer Berücksichtigung des lokalen Verformungsverhaltens

Kaffka, M. (Corresponding author)FZJ* ; Ennis, P. J.FZJ* ; Schuster, H.FZJ* ; Nickel, H.FZJ*

1986
Kernforschungsanlage Jülich GmbH, Zentralbiliothek, Verlag Jülich

Please use a persistent id in citations: http://hdl.handle.net/2128/12484

Report No.: Juel-2092

Abstract: Plate, sheet and tube product forms of the high temperature alloy NiCr 22 Co 12 Mo have been welded using matching filler. When specimens made from such weldments are creep tested normal to the weld seam, the different zones of the specimens (parent metal, heat-affected zone and weld metal) undergo different amounts of creep strain. In this investigation, it is shown that information concerning the creep behaviour of the individual weldment zones is not sufficient for the determination of the integral strain of the weldment. Constraint of the creep strain at the weld-parent metal transition can significantly influence the creep behaviour of the weldment. This effect has been experimentally demonstrated for cylindrical, tubular and flat welded specimens. For a simple transition structure, finite element calculations have been performed and the observed behaviour theoretically reproduced. The decisive parameter for the integral creep strain of a weldment is the volume fraction of weld metal in the gauge length of the specimen. Specimens of different geometrical form but with similar volume fractions of weld metal in the gauge length exhibited similar creep behaviour in tests of up to 2000 h duration. From the relationship between weld metal volume fraction and integral creep strain, a method has been developed which allows the determinationof the strain distribution in a weldment ; the method requires only the usual type of creep test with weldments to be performed.

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Contributing Institute(s):

1. Publikationen vor 2000 (PRE-2000 ; Retrocat)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

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